#include <stddef.h>

int lex_looks_like_year(const char *, int *);
int lex_looks_like_month(const char *);
int lex_looks_like_day(const char *);

#define LEX_SYMBOL \
	/* Results. */ X(END), X(SYNTAX), X(ILLEGAL), X(NOT_FOUND), \
	/* Text. */ X(PARAGRAPH), X(TEXT), \
	/* Edicts. */ X(SOURCE), X(DEFAULT), X(SIGNIFICANT), X(SCORE), X(MAP), \
	/* Arguments. */ X(ARG_KEYWORD), X(ARG_DATE), X(ARG_NATURAL), \
	X(ARG_FREEFORM)

#define X(n) n
struct lex {
	enum lex_symbol { LEX_SYMBOL } symbol;
	int ws_before, new_paragraph;
	const char *s0, *s1;
	size_t line;
};
#undef X
#define X(n) #n
static const char *const lex_symbols[] = { LEX_SYMBOL };
#undef X

void lex_reset(const char *const buffer);
int lex_next(struct lex *);